Ryobi R18AG-0 One+ Cordless Angle Grinder
- Maximum Rotational Speed: 9000 rpm
- Power Source: Battery
- Material Type: Metal
- Voltage: 18 volts
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A cordless 18V angle grinder spinning up to 9000 RPM, suited to occasional grinding and cutting for owners already on the Ryobi battery platform.
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ASIN: B00B8AFJYIModel: R18AG-0Category: Power Grinders
Overview
The Ryobi 5133001903 is a battery powered angle grinder on the 18 volt platform, spinning up to 9000 RPM with a listed motor power around 4 horsepower equivalent and a unit weight of 2.62 kilograms.
Ryobi's cordless grinders trade the constant power of corded models for battery convenience, and the 2.62 kilogram weight and 9000 RPM disc speed place this in line with compact cordless angle grinders meant for cutting, grinding and light metal work rather than heavy fabrication.
- 18 volt battery power
- 9000 RPM disc speed
- Approx. 4 HP motor rating
- 2.62 kilogram weight
Who it's for
DIYers and homeowners on the Ryobi 18V platform who want a cordless angle grinder for occasional cutting, grinding or rust removal. Less suited to tradespeople running a grinder all day, where a corded model avoids battery swaps.
Pros and cons
- Cordless convenience on the Ryobi 18V platform
- 9000 RPM suits cutting and grinding tasks
- 2.62 kilogram weight keeps it maneuverable
- Battery runtime limits continuous heavy use
- Not built for all-day fabrication work
Performance notes
9000 RPM disc speed is typical for cordless angle grinders and enough for cutting, grinding and rust or paint removal on smaller jobs. At 2.62 kilograms it is light enough to control one-handed for short stretches, though battery runtime will limit continuous use compared to a corded grinder.
Specifications
| Brand | RYOBI |
|---|---|
| Model | R18AG-0 |
| Dimensions & fit | |
| Item Weight | 5.78 poundshigher than 83% of 107 power grinders |
| Item Dimensions L X W X H | 11.8 × 11.8 × 13.8 inches |
| Capacity & performance | |
| Maximum Rotational Speed | 9000 rpmlower than 72% of 122 power grinders |
| Power & efficiency | |
| Power Source | Battery |
| Voltage | 18 voltslower than 77% of 103 power grinders |
| Horsepower | 4 hp |
| Construction & materials | |
| Material Type | Metal |
| Color | Black, Green |
| Included components | |
| Unit Count | 1 |
| Included Components | 1 Product |
| Other details | |
| Style Name | Angled |
| Item Type Name | Ryobi R18AG-0 ONE+ Cordless Angle Grinder |
| Eu Spare Part Availability Duration | 3 years |
Closest rivals on specs
CRAFTSMAN V20 CMCG400B Cordless Angle Grinder 4-1/2 Inch- Voltage 18 vs 20 volts (-10%)
Worx WX812L.9 20V Power Share Brushless Angle Grinder- Voltage 18 vs 20 volts (-10%)
20V Brushless Cordless Angle Grinder Kit with 35 Accessories- Voltage 18 vs 20 volts (-10%)
Frequently asked questions
What voltage does the Ryobi 5133001903 grinder run on?
18 volts, on Ryobi's cordless battery platform.
How fast does the Ryobi 5133001903 spin?
Up to 9000 RPM, per the listed speed.
How much does the Ryobi 5133001903 weigh?
2.62 kilograms, per the item weight spec.